Abstract
The article is devoted to improving the safety of experiments carried out at the IGR reactor. The results of calculations of the neutron-physical parameters of experimental devices with a heat-resistant jacket are presented. The use of the casing is intended for additional protection of the IGR reactor core from the possible impact of the melt of the materials of the experimental device. Tungsten, tantalum and carbon fiber reinforced plastic were considered as the material of the protective cover. The use of a protective casing was evaluated according to the following parameters: the effect on the relative power of the experimental device, the effect on the power distribution in the experimental device, the melting temperature and radiation heating of the casing material.